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AUSCERT External Security Bulletin Redistribution
ESB-2018.2408
Security Bulletin: Remote code execution vulnerability in
the JSF used by WebSphere Application Server
17 August 2018
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AusCERT Security Bulletin Summary
---------------------------------
Product: IBM WebSphere Application Server
Publisher: IBM
Operating System: AIX
HP-UX
IBM i
Solaris
Windows
z/OS
Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Resolution: Patch/Upgrade
Original Bulletin:
http://www.ibm.com/support/docview.wss?uid=ibm10716525
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Security Bulletin: Remote code execution vulnerability in the JSF used by
WebSphere Application Server
Document information
More support for: WebSphere Application Server
Software version: 7.0, 8.0, 8.5.5
Operating system(s): AIX, HP-UX, IBM i, Solaris, Windows, z/OS
Software edition: Advanced, Base, Developer, Enterprise, Express, Network
Deployment, Single Server
Reference #: 0716525
Modified date: 15 August 2018
Summary
There is a remote code execution vulnerability in the JSF Sun Reference
Implementation 1.2 used by WebSphere Application Server. The JSF Sun Reference
Implementation 1.2 is used as the default in WebSphere Application Server
v7.0, other versions it is not the default.
Vulnerability Details
CVEID: Not Applicable
DESCRIPTION: Apache MyFaces and Oracle Mojarra could allow a remote attacker
to execute arbitrary code on the system, caused by improper configuration of
ViewState settings. If ViewState is configured to use unencrypted state
information, an attacker could exploit this vulnerability to execute any code
residing in the server's classpath.
CVSS Base Score: 8.1
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/
145172 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H)
Affected Products and Versions
This vulnerability affects the following versions and releases of IBM
WebSphere Application Server:
o Version 8.5
o Version 8.0
o Version 7.0
Remediation/Fixes
The recommended solution is to apply the interim fix, Fix Pack or PTF
containing APARs PI99524 for each named product as soon as practical. JSF
SunRI 1.2 is the default implementation for WebSphere Application Server
Version 7. For Version 8.0 and Version 8.5 , JSF SunRI 1.2 is not the default
JSF, you would only be vulnerable if you have changed to use JSF SunRI 1.2.
For WebSphere Application Server traditional and WebSphere Application Server
Hypervisor Edition using JSF Sun Reference Implementation 1.2:
For V8.5.0.0 through 8.5.5.14: (not default JSF)
. Upgrade to minimal fix pack levels as required by interim fixes and then
apply Interim Fix PI99524
- --OR--
. Apply Fix Pack 8.5.5.15 or later (targeted availability 1Q2019).
For V8.0.0.0 through 8.0.0.15: (not default JSF)
. Upgrade to a minimal fix pack levels as required by interim fix and then
apply Interim Fix PI99524
For V7.0.0.0 through 7.0.0.45:
. Upgrade to a minimal fix pack levels as required by interim fix and then
apply Interim Fix PI99524
WebSphere Application Server V7 and V8 are no longer in full support; IBM
recommends upgrading to a fixed, supported version/release/platform of the
product.
Change History
14 August 2018: original document published
*The CVSS Environment Score is customer environment specific and will
ultimately impact the Overall CVSS Score. Customers can evaluate the impact of
this vulnerability in their environments by accessing the links in the
Reference section of this Security Bulletin.
Disclaimer
According to the Forum of Incident Response and Security Teams (FIRST), the
Common Vulnerability Scoring System (CVSS) is an "industry open standard
designed to convey vulnerability severity and help to determine urgency and
priority of response." IBM PROVIDES THE CVSS SCORES ""AS IS"" WITHOUT WARRANTY
OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT
OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.
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